Since the patch is self extracting where you "put" the patch is irrelevant, and whether you have a partition is irrelevant, and where you installed it to is irrelevant except as where it may mess up the original registry entry.
This is a problem with the registry entry for the game.
Look at the entry for HOI2 and see what the path is, edit it to the actual path where the game is installed, you can use regedit for this.
This is a problem with the registry entry for the game.
Look at the entry for HOI2 and see what the path is, edit it to the actual path where the game is installed, you can use regedit for this.